I love Audiobookshelf, my main complaint is the Android app crashes when killed by Android (so when I try to open it I get a message about it crashing and then have to reopen it). That might just be a me thing.

Hmm, I’ve been using Audiobookshelf on my Android phone(s) for at least the last year without issues like that. Are you using the F-droid or Play Store version? I’m using F-droid if that matters.